Part-number relationships
| Relationship | Reference family | Number |
|---|---|---|
| Primary Delco Remy Part Number | Official 40SI new alternator identity | 8600390 |
| Customer Part Number | Official Delco Remy cross-reference record | DRA8600390 |
Alternators
8600390 40SI 12V 240A Alternator for School Bus A/C and Retarder Applications
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OEM / reference8600390
Specification40SI 12V 240A Brushless Alternator
Catalog ID78045372
- Product Type
- 40SI new brushless alternator
- System Voltage
- 12V
- Rated Output
- 240A
- Mount Type
- J180 long hinge
- B+ Output Terminal
- 5/16 in
- R Terminal
- #10
- I Terminal
- #10
- Remote Sense
- Yes
- Ground / Polarity
- Negative
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
Quotation details: MOQ, availability, lead time, item condition (new or remanufactured) and warranty coverage must be confirmed in your quotation before ordering.
Product fitment guide
Part numbers and compatible models
Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.
Part identification
Reference numbers
Primary number
Other documented relationship
Formatting aliases are the same number written differently. Cross-references require a specification and fitment check; they do not by themselves confirm direct interchangeability. Related assemblies and remanufactured numbers are separate relationship types.
Product summary
40SI 12V 240A Brushless Alternator
- Category
- Alternators
- Catalog ID
- 78045372
- Photo views
- 1
Before ordering
Confirm these details
- Confirm voltage and rated amperage against the original alternator label.
- Compare mounting ears, pulley type and pulley-groove count.
- Check plug shape, terminal position and regulator connection.
- Verify the engine model and machine serial range before ordering.
Machine fitment
Compatible model references
1 model reference
Fitment / evidence notes
Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.
Quick fitment answers
Common questions about 8600390
Which machines use 8600390?
Recorded compatible model references include Official application class: School buses with factory air conditioning or an electromagnetic brake retarder after 2002. Recorded fitment/evidence notes: Fitment limitation: Confirm 8600390, J180 long-hinge mounting, terminals, pulley and vehicle electrical configuration. Confirm the complete part number and machine serial range before ordering.
What numbers are documented for 8600390?
No alternate number is listed for 8600390. Send the original nameplate for an alternate-number check.
How do I confirm 8600390 before ordering?
Confirm voltage and rated amperage against the original alternator label. Compare mounting ears, pulley type and pulley-groove count. Check plug shape, terminal position and regulator connection. Send clear photos of the original unit and connector layout when requesting a quote.